You can make your WordPress! website unavailable to visitors until selected date. To enable this option login to Admin section.
1. Click the Theme Options on admin menu.
2. Scroll at the end of Basic Settings
2. Find field Coming Soon and click the ON / OFF button to enable or disable.
3. Next set date in filed Coming Soon Date.
Click the Save button to implement the new settings.
Note: The Coming Soon will not be available if you are logged in as admin in your site, you will have to log-out or open the site in Incognito Mode.
Title and description you can change in Appearance → Widgets. Find Comingsoon sidebar and change the widget on it. You can also publish different type of widgets if you like.